Koha/Template/Plugin/Cache.pm

   1 package Koha::Template::Plugin::Cache;
   2
   3 # Copyright Catalyst IT 2011
   4
   5 # This file is part of Koha.
   6 #
   7 # Koha is free software; you can redistribute it and/or modify it
   8 # under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  19
  20 use strict;
  21 use warnings;
  22 use base qw( Template::Plugin );
  23 use Template::Plugin;
  24 use C4::Context;
  25
  26 #------------------------------------------------------------------------
  27 # new(\%options)
  28 #------------------------------------------------------------------------
  29
  30 sub new {
  31     my ( $class, $context, $params ) = @_;
  32     my $cache;
  33     if ( $params->{cache} ) {
  34         $cache = delete $params->{cache};
  35     }
  36     else {
  37         require Koha::Cache;
  38         $cache = Koha::Caches->get_instance();
  39     }
  40     my $self = bless {
  41         CACHE   => $cache,
  42         CONFIG  => $params,
  43         CONTEXT => $context,
  44     }, $class;
  45     return $self;
  46 }
  47
  48 #------------------------------------------------------------------------
  49 # $cache->include({
  50 #                 template => 'foo.html',
  51 #                 keys     => {'user.name', user.name},
  52 #                 ttl      => 60, #seconds
  53 #                });
  54 #------------------------------------------------------------------------
  55
  56 sub inc {
  57     my ( $self, $params ) = @_;
  58     $self->_cached_action( 'include', $params );
  59 }
  60
  61 sub proc {
  62     my ( $self, $params ) = @_;
  63     $self->_cached_action( 'process', $params );
  64 }
  65
  66 sub _cached_action {
  67     my ( $self, $action, $params ) = @_;
  68     my $key;
  69     if ( $params->{key} ) {
  70         $key = delete $params->{key};
  71     }
  72     else {
  73         my $cache_keys = $params->{keys};
  74         $key = join(
  75             ':',
  76             (
  77                 $params->{template},
  78                 map { "$_=$cache_keys->{$_}" } keys %{$cache_keys}
  79             )
  80         );
  81     }
  82     my $result = $self->{CACHE}->get_from_cache($key);
  83     if ( !$result ) {
  84         $result = $self->{CONTEXT}->$action( $params->{template} );
  85         $self->{CACHE}
  86           ->set_in_cache( $key, $result, { expiry => $params->{ttl} } );
  87     }
  88     return $result;
  89 }
  90
  91 1;
  92
  93 =head1 NAME
  94
  95 Koha::Template::Plugin::Cache - cache output of templates
  96
  97 =head1 SYNOPSIS
  98
  99   [% USE cache = Cache %]
 100
 101
 102   [% cache.inc(
 103                    'template' => 'slow.html',
 104                    'keys' => {'user.name' => user.name},
 105                    'ttl' => 360
 106                    ) %]
 107
 108   # or with a pre-defined Cache::* object and key
 109
 110   [% USE cache = Cache( cache => mycache ) %]
 111
 112   [% cache.inc(
 113                        'template' => 'slow.html',
 114                        'key'      => mykey,
 115                        'ttl'      => 360
 116                        )  %]
 117
 118 __END__